Coffee brewer



Sept. 4, 1956 l.. ARNETT 2,761,200

coEEEE BREWER Filed Feb. 12, 1953 lfay,

y8 Sheets-Sheet l ,Ze @Zie 7776??,

Sept. 4, 1956 L ARNETT 2,761,200

COFFEE BREWER Filed Feb. l2, 1955 8 Sheets-Sheet 2 Sept. 4, 1956 L, ARNETT 2,761,200

COFFEE BREWER Filed Feb. 12, 1953 8 Sheets-Sheet 3 Sept. 4, 1956 L. ARNETT 2,761,200

` COFFEE BREWER Filed Feb. 12, 1953 8 Sheelis-Sheerl 4 L. ARNETT COFFEE BREWER Sept. 4, 1956 8 Sheets-Sheet 5 Filed Feb. l2. 1953 5 @ffl Sept..4, 1956 L. ARNETT 2,761,200

coEEEE BREWER Filed Feb. 12, 195s s sheets-sheet s Sept. 4, 1956 L.. ARNETT 2,761,200

COFFEE BREWER Filed Feb. 12, 1953 8 Sheets-Sheet '7 Sept. 4, 1956 L.. ARNETT 2,761,200

COFFEE BREWER Filed Feb. l2, 1953 8 Sheets-Sheet 8 United States Patent() COFFEE BREWER Leslie Arnett, Chicago, lll., assigner to United Colee Corp., a corporation of Illinois Application February 12, 1953, Serial No. 336,563

17 claims. (ci. sra- 283) This invention relates to beverage brewing apparatus and more particularly to an apparatus which automatically brews and dispenses fresh coffee.

Beverage dispensers generally are well-known and there are coffee dispensers in use which mix powdered instant coffee with hot water fo1 each individual cup dispensed. The quality of such coffee, however, generally is not as good as that of coffee brewed directly from the ground coffee bean. l have invented and am herein disclosing and claiming an apparatus for brewing coffee in quantities and under pressure, directly from the ground coffee bean, for storing and dispensing this brewed coffee and for brewing a fresh batch of coee when needed. It is to be understood that although I speak of my apparatus primarily in connection with coffee brewing it is equally well adapted for the brewing of other beverages such as tea and the like.

One feature of my invention is that it provides a plurality of sealed brewing pots, a source of heated water under pressure and control means for selectively connect` ing the source of heated water to the brewing pots. Another feature is that pipe means connect the source of heated water to each of the brewing pots and electrically operated valve means automatically sequentially introduce heated water through said pipe means to each of said brewing pots. A further feature is that a dispensing tank is provided which is adapted to receive the brewed beverage and from which the beverage may be dispensed, a fresh supply ofthe beverage being brewed in accordance with the quantity of beverage in the dispensing tank. And another feature of my invention is that a mixing tank is provided which is normally connected to the dispensing tank, but which is isolated therefrom during the brewing process to prevent the strong first brewed beverage from being dispensed. And a further feature is that safety means are provided which prevent brewing a fresh batch of beverage when the measuring tank is not empty. Another feature is that a waste tank is provided which receives any leakage or overflow from the system and means are associated with the Waste tank to disable the apparatus when the level of liquid in the tank reaches a predetermined point. A further feature of my invention is that it provides a brewing pot comprising two members, adapted to be sealed together, having readily connectable inlet and outlet fittings and a filter over the outlet.

Further features and advantages of my invention will be readily apparent from the specification and from the drawings in which:

Figure 1 is a front elevation of a brewer and dispenser embodying my invention;

Figure 2 is a front elevational view of the apparatus of Figure l with the door and cup `dispenser apparatus removed to show the arrangement of the elements in the interior;

Figure 3 is a side elevational view looking from the right in Figure 2 with the cup dispenser and portion of the `door in place;

2,761,200 t. Patented Sept. 4, 1956 Figure 4 isa fragmentary flow sheet illustrating the i operation of my invention;

Figure 5 is a vertical section of a brewing pot;

Figure 6 is a horizontal section of a brewing pot taken along line 6-6 of Figure 5, with a portion of the filter broken away;

Figure 7 is a front elevational view of the cup dispenser, cup support and sugar and cream dispenser with the back of the front panel removed;

Figure 8 is a top plan view of the structure of Figure 7 with the back of the `front panel shown;

Figure 9 is a fragmentary vertical section taken along line 9-9 of Figure 8;

Figure 10 is a fragmentary vertical section taken along line 1ti-10 of Figure 8; and

Figure 1l (11a and 11b) is a schematic diagram of a control circuit used with my apparatus.

Referring now to the drawings, a housing contains the various elements of my apparatus and has a front panel 21 which may be hingedly mounted to provide access to the interior. The front panel 21 has an access opening 22 therein through which a customer may receive a cup 23 of coffee. A selector 24, which may have a lighted center dial 24a, permits a customer to choose the drink he desires, as indicated on the display panels 25, fort example black coffee, coffee with cream, coffee with sugar, or coffee with cream and sugar. A coin slot 26 is adapted to receive the proper coinv from the customer to initiate. a dispensing operation; and coin return mechanism 27 allows the customer to deiilect bent coins or the like through the coin return opening 27a. The panel 28 may contain an advertising display.

Referring now to Figures 2, 3 and 4, water is introduced to the apparatus from a source such as a water main, not shown, through strainer 29, check valve 30, pressure reducing valve 31 and inlet pipe 32 into a water heater 33. A pressure and temperature operated relief valve 34 connected to the water heater 33 prevents excessive pressures or temperatures from building up within the heater; any overfiow fromthe relief valve 34 will passthrough pipe 35 into waste tank 36.

A plurality of brewing pots 40, 50, 60, 70, Sii and 90 are mountedin two tiers in the upper rear portion of the housing 20. Hot Water may be delivered from the water heater 33 to each of the brewing pots through delivery pipe 38, electrically operated safety valve 39, individual electrically operated pot Valves 41, 51, 61, 71, 81

and 91, and individual pot inlet pipes 42, 52, 62, 72, 82 and 92. A first storage tank or measuring tank 37 is mounted below the brewing pots and is adapted to receive the brewed coffee therefrom through pot outlet pipes 43, 53, 63, 73, 83 and 93. `A second storage tank or warming tank 47 is mounted below thelfirst storage tank 37 and receives the coffee therefrom through measuring tank outlet valve 48. A dispensing pipe 49 leads from the warming tank 47 through coffee dispensing valves S7 and 57 and has a discharge opening 58 `positioned to discharge `coffee into cup 23. The brewing pots, storage tanks and piping are preferably made of stainless steel.

Cup dispensing mechanism S9, which may be of any suitable design, is pivotally mounted in front of the brewing pots 40, 50, 60, 70, and 90 and may be swung outwardly when necessary for servicing. Cups 23 which are released from the p cup dispensing mechanism 59 fall through cup chute `67 and are caught in jaws 68 at the bottom of the access opening 22, in positionrto receive `coffee from the `discharge opening `58.

Cream dispenser 69 and `sugar dispenser 69', Figures 7, 8, 9 and 10, are mounted on therback side of the front panel 21. They are identical in construction and operation and only the cream dispenser 69 will be described in detail; corresponding elements of the sugar dispenser will be given the same number as that element of the cream dispenser with an added prime notation. Cream dispenser 69 has a container 77 that holds a quantity of powdered cream and a dispensing worm 78 which is driven by a motor 79; a cover 77a closes theA top ofthe container. When the motor 79 is energized, it turnsl the worm 78 which forces a quantity of powderedy cream through the opening` 87 from which it isr allowed to fallthrough a chute 88 into the cup 23. A leafr spring 89 mountedon an` eX- tension 78a of the worm 78 Acovers the outlet opening 87 when the dispenser is not-in operation to prevent moisture from causing the powdered cream to cake.` The force of the powdered cream driven bythe worm 78 pushes the spring away from the outlet openin g87 andthe creaml falls through the chute 88'into 4cup 23; As showny in Figure 9, granulated sugar from the;v sugardispenser-69 also falls through chute 88 into cupl23: Springs 98 turn with the worm 78` and agitate the powdered cream, to keep it feeding properly and to preventlcakging.

` Referring now to Figures -aridtl a brewing pot 40 is made up of a first member or cov, er40a` anday second' member or base-40b which are held togethenin tightly sealed relationship by bolts. 102.- A threaded inlet fitting 103 in thev cover member 100-is adaptedl to be coupled tothe pot pipe 42, through which heatedwater is introduced to the brewing pot. Openings 104 in the inlet fitting 103 cause-the incomingV water to hev sprayed; under pressure, over the ground coffee ,105. Thebase member 40b is generally dish shapedand has an upwardly extend# ing peripheral rim 40H. A threaded outlet fitting 107 in the base memberAObfis adapted'to be connected` to an outlet pipe 43 whichy leads to the measuring tankl 37.

Threaded ttings 103 and-107are usedon the brewing pots so that the pots may readily be removed for washing and recharging withr ground coffeeafterl they have been used.

Al wire screen 108=of rather fine mesh is placed in4 the dished portion of the base 40b to support-'the filter elements. The filter itself lis made up ofash'eet of 'tightly woven lter paper 112-which is placed over` lter cloth' 113 on top of the screen-108. The paper-112 performs substantially all of-the filtering and the major purpose of the cloth 113 -is to prevent the paper from tearing. Resilient gasket 109, which may be o f rubber, insures -a .tight seal between 4the cover 40d and the,barsev40`b"of the brewing pot. The tightly wovenpaper filter 112 'removes all particles of the coffee bean fromY the infusion before it passes to the measuring and dispensing tanks 37and 47.' As a result, the coffee does not become bitter even though. it may stand in the tanks for several. days.

Referring now` to the flow sheet, `Figure ,4,'vcold 'water cornes froma pressurized-main, as a, city ywater `supply main, not shown, through a strainer 30,' check valve 31, pressure reducing valve 28 A andrinlet pipe.32 wlriichjex-H tends downwardly to a point near the bottom ofthe water heater 33.y An air buffer tank"110 is connected to the top of the heater. Water is heated, preferably to a ternperature of 180 F., by an electrical heatingelement 117 controlled by thermostat 118.'A Associated with the deliverypipe 38, which conducts the Water tothe brewing pot'40 during the brewing cycle, are a pressure operated switch 119, safety valve 39, and pressure indicator 120. When safety Valve 39 and pot valve 41 are both open, the heated water will flow through delivery pipe ,38 'and pot pipe 42 to the brewing pot 40 ywhere it will besprayed, through openings 104, over thel ground coffee 105. VSin-ce the brewing pot 40 is sealed, the heatedwwater,I will be forced, preferably under a pressureof labout 5 pounds` per square inch,y to percolate down through the igrounds 105 to brew the coffee.k The infusionor'liquid coffee passes on through the filter paper ,112,filter cloth1`13and outlet pipe `43 rinto the Jfirst storagel tank Aor, measuring y tank 37. When measuring tank outlet valve.48s opened, after the brewing -`cycle 4is completed thnecolieye;l may, uovtm rounded by an outer casing 121 to prevent unnecessary loss of heat. The coffee dispenser'valves 57' and 57", two being used to prevent loss offcoffee if one should become jammed open, control the ow of coffee through the dispensing pipe 49 from which it goes to the cup 23 where it mixes with cream and sugar, if selected, which is delivered through the chute 88.

When the level of the coffee in the warming tank 47 falls below a predetermined point;. a. brewing cycle is started. At this time an automatic selector switchto be described' later, connects the sourcef'of'heatedwater to an unused brewing pot and at the same time the measuring tank outletvalve 48.is, closed. Thellottwatenis. allowed to flow to the brewing pot, through thecoffee therein, and on into the measuring tank'37 untillth'e level of the coffee in the measuring tank reaches a predetermined point, as described above. At this time both the pot valve and the safety valve 39 are closed andthe flow of heated Water is stopped; and the measuring-tank"outlet'valve 48 is opened allowing the brewed" coffee' to flow' from the measuring tank into the warming tank 47.' When the level of the coffee in the `warming tank again falls' below. the predeterminedjpoint; the processis repeatedwith a diiferent'one of the'brewingk pots. This continuesuntil. all of j-the pots have been used. d

As previously stated, Iprefer to'brew 'coffee with water; under pressure of yabout five pounds per square inch. By the verynature oflmy apparatus, the water standing in thepotfpipes 42,' 52,' 62,' 72;` 82`and 92 willb'e cooled'below the temperature of '180 F., before it is sprayed`into apot.` This small amount oficool water spread over the grounds -at the beginning of the brewing improves the quality of the coffee. It is preferable to keep the measuring -tank outlet valve 48closed xduringbi'ewing to prevent thefirst brewed coffee, which may be very strong, from enteringrthe war-ming tank 47 'beforeit has been diluted with the remaining infusion. Alcircuit for providing1 this control will be described later.

Any condensation from the brewing pots 40,` 50, 60,vv 70,' 80jand90, and the measuring tank' 37,l or leakage` fromany improperly tightened iittings, is collected'in-a drip pan 123from which it is conducted to th'e waste tank 36 throughia drainpiple 124;' likewise, ,any overfiow-from the warmingvtarilc' 47' is.conducted'to'the waste tank through overflow pipei125;` and any. liquid'spilledffrom the cup 23'ows into the wasteV tank' through pipe 126. (Figure 3). As wasrformerly pointedfollhthe overflow from .the pressuref relief valve 3,4 also ilws into the waste. tank 36,' As will (appear more full'ylater, whenthe leveljof liquid in thewaste tank' reaches a predetermined point the apparatus is' disabled.

Referring now to the control lCircuit,Figures ,llaandl 11b.l Connection .between the two portions of. the circuit; are indi'catedjbydike letters associatedwithlconnecting wiresm The circuit is energized Lby connecting terminals. 145Q'and '141'toa source of power, for example llOfvolt's A. Ci The heater element 117,whic'his' associated with the. water heater 33,V is energizedfthrough a -manual switch, 143, thermostaticcontrol switch 118 and, .pressure switch 119;l Normally, the thermostat 118 willkeepvlthe. heatingv element V11' 7y operatingat the fpropentemperature. If, in

the event of a failure of the thermostat 118, thetemperature or pressure rise abnormally therelief valve .3,4 should open andremedy,the,situation. If, however, therelief` valve should fail to function properly a pressure.opA eratedv switch 119 connected in thedelivery line 38 will open and de'energize heater 117, allowing thewaterin. heater tank 33 to cool. The operatingqpressurerofthe switch v119 is preferablyhigher than. thatJof itherrelief valve l.34.. Heater element 147 is` associat ed. withtatheir:

warming tank 47 :and is energized through manual switchen provided with a fuse 151 to protect against excessive current drain. The remainder of the circuit is energized through the main fuses 152 4and 153.

Assuming that the overilow switch 154, associated with the waste tank 36 is closed, the circuit will be in condition for operation. The dispensing operation will be considered first.

A disabling relay 157 is normally energized from one side of the line 155 through wire b, normally closed contact 14917 of the sold-out relay 149, contact 158a of the mechanically operated cup supply switch 158, `wire 159 land wire 164) back to the other side of the line 161. Thus, contacts 157:1 and 157b :associated with the disabling relay are normally closed as shown in the drawings. The coin reject magnet 162 is normally energized from wire b, through wire 163, contact 164a of the cup motor switch 164, contact 165b of the cup motor relay 165, and contact 157b of the disabling relay. When a coin is inserted in the slot 26 and is passed by the coin reject magnet 162, it strikes the coin switch 168 and moves it momentarily to the dotted line position shown in the drawings. With the coin switch 168 in this dotted line position, the cup motor relay 165 is energized from one side of the line 156, through contact 168b and wire 160 back to the other side of the line 161. This opens contact 165b, to deenergize the coin reject magnet 162 preventing interruption of the dispensing cycle by the insertion of another coin; `and closes contacts 165a, a holding contact, and 165e in the circuit of cup motor 169. After the coin passes, the coin switch 168 returns to its normal position closing contact 16851 which energizes the cup motor 169 through contact 157:1 of the disabling relay and contact 165C of the cup motor relay.

Associated with the cup motor 169 are four mechanically operated switches 164, 1690, 169b and 169C which i are closed and opened by a series of cams mounted on the shaft of the motor. As the cup motor 169 begins to turn, the coffee switch 169a will be closed energizing the coffee dispensing valves 57 and 57 and operating the counter 170. Shortly :after switch 169a is closed, switches 169k and 169e, associated with the cream 'and sugar dispenser motors 79 and 79 respectively will be closed. Before the coin was inserted, the selector 24 was adjusted to select the desired drink; for example, if both cream and sugar were selected both switch 24a, in the sugar circuit, and switch 24b, in the cream circuit, were closed. The cams 'associated` with switches 16917 and 169C keep these switches closed for 'a sufficient length of time to dispense the proper quantity of sugar and cream and then open them again, stopping the cream and sugar motors 79 and 19. After a cup of coffee has been dispensed the cam associated with switch 169a will open this switch, closing the coffee dispensing valves 57 and 57. The cup motor 169 continues to run and the cam associated with cup motor switch 164 opens contact 164@ which breaks the circuit to cup motor relay 165 deenergizing it and opening holding contact 165a and contact 165C in the cup motor circuit; at the same time, contact 16417 is closed. The cup motor 169 continues to run until the cam associated with cup motor switch 164 reopens contact 164b and closes contact 164e; the dispensing circuit is now ready to begin another cycle.

The dispensing cycle may besummarized as follows. A coin inserted in theslot momentarily operates coin switch 168 to energize the cup motor relay 165, and then the coin switch returns to its origin-al position to energize p the cup motor. A series of cams driven by the cup motor 169 operate switches 16951, 169b and 169C to dispense the desired beverage. A fourth cam driven by the cup motor 169 Aoperates the cup motor switch 164 to stop the cup motor and return the dispensing circuit to its normal condition.

When the level of coffee in the warming tank 47 falls below a predetermined point it is necessary to brew a fresh batch of beverage. The control circuit for this por- 6 tion of the operation will now be described. We will yassume that all six of the brewing pots contain a fresh supply of ground colee.

The automatic sequential brewing process is controlled by a step timer switch indicated generally as 175. This switch includes a step switch motor 176 that drives a pair of discs 177 and 178, a plurality of single pole, double throw pot switches 44, 54, 64, 74, 84, and 94 and a single pole, double throw :alternate switch 181. The motor 176 drives the discs 177 and 178 in a clockwise direction, as shown in the drawings; in the position shown the system is ready Vto begin the brewing cycle with the` brewing pot 40.

The operation of the brewing circuit is controlled by electrodes 182 and 183 in the measuring tank 37 and electrodes 184 Eand 185 in the warming tank 47. As will presently appear, a relay is associated witheach of these` electrodes and each relay will be energized when the coffee in the tanks 37 and 47 covers the bottom end of the 'associated electrode, the circuit of each relay being completed through the relatively high resistance of the liquid coffee. A transformer 186 provides the necessary voltage for operating the relays used in this secondary control circuit, and secondary 186a of the transformer has one end grounded at 187; tanks 37 and 47 are also grounded to complete the circuit. The secondary control circuitis thus isolated; protecting the users of the machine from any possible shock.

Assuming that the apparatus has brewed a batch of coiee and that this coffee has all been transferred to the warming tank 47, there will be suicient coffee in this tank to cover the lower ends of both electrodes 184 and 185. Electrode is positioned adjacent the bottom of warming tank 47 and is associated with the sold-out relay 149. Thus, so long as there is any coffee remaining to be dispensed, sold-out relay 149 will be energized and contacts 149a and 149]] associated therewith will be closed. These contacts are in the circuits of the warming tank heater element 147 and the disabling relay 157, respectively.

Normally, when coiee is not being brewed the measuring tank 37 will be empty, and the brewing stop relay 188, associated with electrode 182, and the safety relay 189, associated with electrode 183, will be deenergized and their contacts 188a and 189a, respectively, will be in the position shown in the drawings.

When the level of the coffee in the warming tank 47 falls below the electrode 184, the brewing start relay 192 will be deenergized and the associated contact 192a will close, as shown. Electrode 184 may be positioned any desired distance above the bottom of warming tank 47, for example a suicient distance to deenergize relay 192 when 25 cups of colTee remain in the tank. This coffee may be dispensed during the brewing process. The brewing process is preferably begun before the warming tank 47 is empty in order that the dispensing apparatus will not have to be shut down while waiting for a fresh supply of coiee.

When the level of coffee falls below electrode 184 and deenergizes the brewing start relay 192, a circuit is completed from the line 155, through contact 19211, contact 189a, contact 193a of normally energized motor stop relay 193, wire m, one or more of the contacts 45b, 55b, 65h, 75b, 85b and 95b and wire 1 to energize the vstep motor 176. The normally energized motor stop relay 193 is connected in series with contacts 44a, 54a, 64a, 74a, 84a and 94a across the source, and so long as the step switch is in the position shown, this relay will be energized. The measuring tank outlet valve 48 is energized through contact 181b of the alternate switch 181.

When the step switch motor 176 is energized, the discs 177 and 178 will turn in a clockwise direction. The plunger 181e associated with alternate switch 181 will move out of the depression 177a, opening contact 181b 3to close the measuring tank outlet valve 48 and will at the zwang-ew same time closel contact 18121 toJopentlie'safetyYvalve 39! The step motor 176- Vwill continue to 4turn' until thejplunger" 44eV of brewing pot switch 44 enters' the" depression 178'cr; opening contactl 44a and closing contact- 44b. Contact 44a is in thecircuit of theimotor stop relay 1'93; as 4411 isfopened, relay 179,3 -will b'e deenergized and its -associatedf Contacty 193aiwill open deenerg'izing" the step motor176; A-t the 'saine time, contact 44'b of lbrewingp'otfswitch 44\will close in turnenergizing the-individual pot'valvel 41` aind potrelay Since both the safety valve 39'iand the pot valve=41' areopen; heated'waterl will ow through delivery pipe 381, an'dlpotlpipel42 tolsealed brewing pot 40, where it is sprayed over ground coifee 105. The b'revtfedkcoffeeI from'brewingpot 40twill:iiowfthrough` the ontletpipe 43 into-thel measuring tank 37. The'pot relay 45; which was? also energizedI whencontact 4411 of the pot switch was'=closed; opens contact45'b in the brewing Vstart circuit and Contact 45a. which'v is' associated with an indicator lightf46. Therelays 45; 55; 65,l 75;` 85 and 95-are preferably of'the manually reset type; tlratlis-7 once theyv have been energizedvandtheircontacts openedthey'must be`V manually` reset to' close the contacts;V The reason for 'this will'be' apparent later.

Asthelbrewin'g process continues, thelevel of coffee will risel in-the measuring tank 37 until it reaches the brewing stop electrodelSZ. When this occurs; thebrewing stop rela-y 18S will been'ergized audits associated `contaetlila will be closed. This completes' a circ'uitthrough1 contact 18-1alofthe `alternate switch, which is" closed at-this vtime, tolen'ergizethe step switch motor 176;' The'motor will begin =to turn andvtlie`plungen44c of'potl switch 4-4w`ill be' raised out' of the depression 173@ to open' Contact 4411' and deenergize the potrelay 41,y stopping `the brewing process. The motor will continue to'turn until the operatingplunger 131C of alternate switch 181-enters depressionl 177b. This opens 'contact 18161 and stops the'step'switch motor=176 and clos-es the safety valve 39: At'the'sarne time contact 18th-is closed energizingthemeasuring tank outlet valve-48to allow the'brewedcoffee 'topass from the measuring tank 37 into the warming tank 47. It' is` desirable toisolate thesev two tanks duringlthe'brewing processso that thefrelativelystrong first brewed'coffeev may Abe. diluted by the weaker later'brewed coffeerbeforer it is dispensed, asfhas been pointed out previously.

The brewing control circuitsisnow ready to begin` an-l other brewing cycle, as soon as the level lof the' coffee lin thewarming tank 47"again 'falls below the level of electrode 184.5 The "brewingcycle-operates successivelyin thesame manner with brewing'pots50; 60; 70;'86` and"9t)"andwill notrbe -described in detail. Y

As was previouslymenti'oned, the pot relays 45", 55;l 65;A 75,2851 and..95 are of the manuallyreset type: Since" each2relayl is energized during 'the period that its-asso'- ciatecl'brewingfpot is being used'in thebrewing process; after-'all six brewingpots'havebeenused, all sixofthe contacts -45b, 515D, 65b,y .75b,-85b 'and 951: will beop'ened. Theseontactsare in series with-the step'motor 176 in'thel brewing start circuit and when they have all been opened, afbrewingcycle cannot be Istarted'. lndicator"lights"46, 56; .66, .76; 86Iand 96are deenergized astheir respectiveA potsgareusedand indicatelvisuallyto a servicemanwhich" ofvthe potsmust be-replaced.4

Should-.the warmingtank 47 -bel entirely empty,\either duringthe .brewing cycle or Iwhen all brewing 'pots'y have been, used, the .tsoldout? relay 149 will be deenergizedi This'twillr open contacty 149ainthe warming tank'heaterf circuit,` contact `1491;. in theenergizingircuit ofthe dis-` abling5relay1157 and close contact 149e toilight =`soldout light 1194. The sold-out light `.194 is' also energizedby the cup supplyfswitch `M8, .which isa mechanical switchv4 associated withrthe cup dispensingmechanism. 59S When thex supplyj of vcups lis exhausted contactv l158e: willy be opened Ideenergizing .the disabling trela'y `157 andE closing; contact `15.8b .to light the .soldout. light. 194'.

thewasfeffak sube-comes lured withnquid, the' mercury overflow switch' 1'54, which isassociated'withifloat 195: will be opened. This deenergizes everything inltheapl p'aratus; except: the heater: circuitsy associated with" the Water; heater" 3'1'Z andthe wa'irningi'tankl 47.

While I have shownand described certainembo'dirnents' of my invention, it is to be understood that it is`capable of many/'modifications Changes,` therefore,- in the; conf struction'l and arrangement may be made without' departl ing from the'spirlt and scope of the invention as disclosed inthe appended claims;

I' claim:

l', Beveragebrewing*and"dispensingapparats of the characterI described, comprising: a plurality of' sealed brewing pots; awater heatera'dapted tobe connectedY to said'brewingfpots through a'saf'etyvalve; a s 'ourceof' water under pressure connected to'said'water heater; a pressure and temperature' operated relief valve on said water heater; arst storagetank connected'to said brew'-l ing potsto receivebeve'rage therefrom; a second stor" age tank connectedAk to said r'stisto'rage tank; means-for dispensingbeverage'from"saidsecond storage tank, said means'having an outlet; acup support positioned beneath said' outlet; controlmeans forconnecting said hot water heater` to a`different"one` of vsaid brewing pots each time the levelofith'e beverage in said tankfalls below a'predetermined' point; awaste tank; a drippan associated'v with said brewingpots and said rst storage tank to collect any leakageth'erefrorn; a drainfor conducting said lleakage' from said dripl pan`to said waste tank; a drain for conducting'any overflow from said relief valve to said waste tank; an' overflow line connected to saidl secondy storage tank for conducting any overflow to said Waste tank; a"dr'ain` line'forconducting' any 'leakage from'said dispensing'means outlet to said waste tank; a oat operated switch associated with' said'wastetank, saidswitchbeing opened when the level 'of liquid in said waste4 tank reaches apredeterminedpoint, thereby clo'si'n'gjsaid safety valve and disabling said dispensing" means' and said control means;

2. A unitary' beverage 'preparing' and coin-actuated"dis pensi'ng maehineofthe character described, whichbrews beverage from a particulate beverage' ingredient, coni# prisin'g: a plurality of beverage brewing pots, each adapted to contain aquantity of aparticulate beverage ingredient;

heated brewing water to prepare fresh quantities of beverage.

3. A unitary" beverage preparing and coin-actuated dispensing machine ofthe character described, which brewsbeverage from aparti'culate beverageingredient,`r

comprisingi a plurality of beveragebrewing'pots, each adapted to'contain'a quantity of particulate beverage ingredient';i a source offheated brewing water under pres-y sure; valves for connecting each `of saidbrewing *potsl 'with saidf'source Aof brewing water;l a storage'tank for'receiv'- ing brewed beverage from said pots;- coiniactuated dispensing means for dispensing quantities of beveragefrom saidi storage tank; and a brewing controlcircuit operable asa function of the quantity of'beverage in said tank and including a rotary,v step'selecto'r 'control switch for selec# tively actuating said 'valvesvtoconnect said brewing pots sequentially with said source of heated brewing water to prepare a freshfquantity `of' beverage for 'replenishing the supply of beveragein saidl storage tank as necessary.

In ther-vent. some KAportion.of.-.the :apparatus fz'tilseandl75' 4i.i Abeveragepreparinganachinefofithe charaeter'described, comprising: a plurality of beverage brewing pots, each adapted to contain a quantity of particulate beverage ingredient; a source of brewing liquid; valve means for connecting each of said brewing pots with said source of brewing liquid; a storage container for receiving beverage from said pots; means for dispensing beverage from said container; and means responsive to the quantity of beverage in said container for initiating a beveragebrewing cycle, said last mentioned means including a rotary step control switch controlling said valve means to connect said brewing pots sequentially with said source of brewing liquid.

5. A unitary beverage preparing and coin-actuated dispensing machine of the character described, which brews beverage from a particulate beverage ingredient, comprising: a plurality of beverage brewing pots, each adapted to contain a quantity of particulate beverage ingredient; a source of heated brewing water under pressure; valves for connecting each of said brewing pots with said source of brewing water; a storage tank for receiving brewed beverage from said pots; coin-actuated dispensing means for dispensing quantities of beverage from said storage tank; a brewing start circuit including a plurality of parallel connected switches, one switch for each of said pots; means responsive to the quantity of beverage in said storage tank for initiating a beverage brewing cycle, said last mentioned means including a rotary step selector switch for selectively actuating said valves to connect said brewing pots with said source of heated brewing water in a predetermined sequence to prepare fresh quantities of beverage; and means for opening one of said parallel connected switches each time a pot is used, preventing completion of the brewing start circuit and reuse of said pots when all have been used.

6. A unitary beverage preparing and coin-actuated dispensing machine of the character described, which brews beverage from a particulate beverage ingredient, comprising: a plurality of beverage brewing pots, each adapted to contain a quantity of a particulate beverage ingredient; a source of heated brewing water under pressure; valves for connecting each of said brewing pots with said source of brewing water; a mixing tank for receiving brewed beverage from said pots; a storage tank for receiving brewed beverage from said mixing tank; a normally open valve between said tanks; coin-actuated dispensing means for dispensing quantities of beverage from said storage tank; means responsive to the quantity of beverage in said storage tank for initiating a beverage brewing cycle, said last mentioned means including a rotary step selector switch for selectively actuating said valves to connect said brewing pots sequentially with said source of heated brewing water to prepare fresh quantities of beverage; and means actuated by said rotary selector switch for closing the valve between said mixing and storage tanks only during the brewing cycle.

7. A beverage brewing apparatus of the character described, comprising: a source of liquid; a plurality of brewing pots; pipe means interconnecting said source of liquid with said pots; tank means for receiving brewed beverage from said brewing pots; a plurality of electrically operated, normally closed pot valves associated with said pipe means; a source of voltage; a circuit including a multi-position, motor-driven selector switch for connecting said source of voltage to said pot valves; and means responsive to the level of beverage in said tank means for energizing said motor when the level of the beverage falls below a predetermined point to move said selector switch to its next operative position for selectively connecting one of said pot valves to said source of voltage to open said valve and allow liquid to How into the pot associated therewith.

8. A beverage brewing apparatus of the character described, comprising: a source of liquid; a plurality of brewing pots; pipe means interconnecting said source of liquid with said pots; tank means for receiving brewed beverage from said brewing pots; a plurality of electrically operated pot valves associated with said pipe means; a source of voltage; aicircuit, including rotary switch means, for connecting said source of Voltage to said pot values, said switch means selectively connecting said source of voltage to said valves for opening said valves to allow liquid to tlow into said pots; means responsive to the amount of beverage in said tank means for actuating said rotary switch means to select and open one of said pot valves when the beverage in the tank means needs replenishing; and means responsive to the level of beverage in said tank means controlling said rotary switch means to close said opened pot valve when the level of the beverage reaches a predetermined point.

9. A beverage brewing apparatus of the character described, comprising: a source of heated water; a plurality of brewing pots; pipe means interconnecting said source of water with said pots; tank means for receiving brewed beverage from said brewing pots; a plurality of electrically operated, normally closed and normally deenergized pot valves associated with said pipe means; a source of voltage; circuit means including a motor-driven, multiposition selector switch for interconnecting said source of voltage and said pot valves; a iirst circuit, including a switch, for energizing said selector switch motor; means responsive to the amount of liquid in said tank means for closing said last mentioned switch when the tank needs replenishing, energizing said motor to move said selector switch to its next operative position connecting only one of said pot valves to said source of voltage, to energize and open said valve and allow water to flow from said source into the pot associated therewith; a second circuit, including a switch, for energizing said motor; and means responsive to the level of liquid in said tank means for closing said last mentioned switch when the level of liquid reaches a predetermined point, energizing said motor to i move said selector switch to a position disconnecting said pot valve from said source of voltage for `deenergizing and closing said valve.

10. Beverage brewing apparatus of the character described, comprising: a source of heated water; brewing means; pipe means interconnecting said source of water and said brewing means; a first tank adapted to receive brewed beverage from said brewing means and a second tank adapted to receive brewed beverage from said first tank; electrically operated valve means associated with said pipe means; a source of voltage; a circuit including switch means for connecting said source of voltage to said valve means, said switch means automatically connecting said source of voltage to said valve means for opening said valve means to allow water to iiow into said brewing means; an electrically operated, normally open valve between said rst tank and said second. tank; means responsive to the level of beverage in said second tank controlling said switch means to open said valve means when the level of beverage falls below a predetermined point; means for closing said normally open valve while said valve means are open; and means responsive to the level of beverage in said first tank controlling said switch means to close said valve means when the level of beverage reaches a predetermined point and to open said valve between said first and second tank 11. Electrical means of the character described in claim 10 including means for preventing operation of said switch means when beverage remains in said iirst tank. l

12. A unitary beverage preparing and coin responsive dispensing machine of the character described which ybrews beverage from a particulate beverage ingredient, comprising: beverage brewing means provided with a plurality of beverage ingredient charges; a source of hot water under pressure for brewing fresh beverage; tank means for receiving brewed beverage from said brewing means; a source of electrical power; coin-actuated, electrically operated dispensing means for serving from said tank means a predetermined quantity of beverage on each' actuation;- waste receiving means for receiving waste-*leakage and drippage from-the various-elements of thelsyster'n'; switchmea-ns responsive to the quantity o'fv waste in said receiving-means forr interrupting a conneetion with said power surc`e;a brewing pot forming part of said beverage brewing'means and containing alcharger of said particulate material; means for providingI a; p'ressure-tight liquidiow' connection between said pot andsaid source of hot water; and'l automatic, electnicallyy operated beverage brewing control means, including `an-electrical circuit having said waste responsive switch means'- therein; operable ass a function of the quantity'l ofi beverag 4insaid tank' means to initiate and terminate a owofhotwaterfrom said source through said connection and-intosaid pot to'prepare a quantity otfresh beverage and replenish the supply of beverage in' said' tank mean'siiinfa'ccordance with demand.

13.` A unitary' beverage preparing and c-oin responsive machine of the*character'described,A which brews beveragefrom a particulate beverage ingredient, comprising: beverage brewing' means provided with a plurality of beverageingredient chargesja source of hot water under pressure for' brewing" freslibeverage'; tank` means for receiving brewed; bevenage" from said brewing means; a source of electrical power; waste receiving means for receiving' waste`leakage`-and` drippage from the various elements of the"system;vswitch means responsive to the quantityV of waste" insaid receiving'means for interrupting "a connectionwith'rsaidp'ower source; coin-actuated, electrically operated dispensing means for serving from said tank' means a predetermined quantity of beverage oneach actuationl and including a circuit having said waste responsiveswitch means therein; a brewing pot forming a part'of said beverage brewing means and containing a charge' of said'particulateV material; means for providing a' pressureitight' liquid flow connection between said pot and said'l source of hot water underl pressure; and automatic,` electrically operated beverage brewing control means including a circuit having said wasteresponsiveswitch'tlierein, and operable as a function of the quantity of beverage in said tank means to initiate and terrhiriatea'floiiv ofhotwater from said source through'said connection and into said pot to prepare a' quantityv offreshbeverageand replenish the supply ofbevenage in" said tank'meaus in accordance with demand, atleast onevoffthe initiation and termination being a`function ofztlieA level of beverage in said tank means.`

14. Aunitary beverage preparing and coin responsive dispensing machine of the character described, which brews beverage from a particulate beverage ingredient, comprising: beverage 'brewing means provided with a plurality of beverage ingredient charges; a source of electrical power; switch `means responsive4 to the quantity of'particulate beverage ingredient remaining unused for interrupting a connection with said source of power; a source of hot water under pressure for brewing fresh beverage; tank means for receiving brewed beverage from said brewingy means; coin-actuated, electrically operated dispensingmeans for serving from said tank means a predetermined quantity of beveragevv on each actuationywaste receiving means for receiving waste 'leakage and drippage from the various elements of the system; switch meansresponsiv'e to the quantity of waste in said receivingmeans; a brewing"y pot forming a part of saidbeverage brewing ymeansl and containing a charge ofsaid particulate material; means for 'providing apressure-ti'gh't liqidoiv' conneetion between'said pot and sa'id` source of" hot waterg" and' automatic,l electrically operated beverage brewing"l control' means including brewingv start circuit means' having connected 'therein said; wa-'ste responsive swr chY means" and said' beverage ingredient responsive switch means; operable `as a unction"of^`the` quantityotfbeveiiage'infsaid tank' meansto initiateli'andterniinateaeflow of* hoit'w'ater from" said" source: through-said connectinand into said pot to prepare aj quantity] of fresh''-beverageI and replenish the supk rrieans ini-accordance*with-demand.

beverage preparing and' coin responsive ne; of thel character described,` which brews beverage froin pa'r'ticul-atelbevenage ingredient, comprisingi' bevera lirewingmeans'L includingV a plurality` orf; remo le andreplaceable pressure brewing pots each f containing a` chargeofparticulate beverage ingredient;aA source" of* hot water under pressure `for brewing fresh'beverage'jtanlcfmeansfor receiving brewed beverage from saidbrewing means; a source of electrical power; coin-aotuate'; electrically operated dispensing means for"= serving Yfrom-`saicl't'ank-[means afpredetermined quantity of beverage loir-each actuation; waste receiving means forreceivingwasterlealnageiand drippage from the various elements of the"isysterir'g"fswitchV means responsive to the quantity of 5 w'asteirr'saidreceiving'means for interrupting'a connectioiilwitlisaidl' power source; means for providizrgia'pi'essure-tigh quid flow connection between onev of 'saidpiot ands y electricallyt operated jbev 'rage brewing-control means, inclu'ding'l an electrical circuit having said waste responsive switch' means v.therl operableJ asVv a function of the quantity'of be'verageun'` saidwt-ankmeans to initiate and terminate a flowo hotiwatenfromi said source through said connection-meanstand'into "oneof said pots to prepare fresh beverage*saidtrneans including means for selectingsuccessive ones'fiof said brewing pots on each brewing'operation- 16. A unitary b'everahge p'reparing'and coin responsive dispensing machine ofthe'character' described, which brews'l beverage* from i a f particulate beverage ingredient, comprising: beverage brewingfmeansineluding a plurality of :removable` andlrplaceablerpressurebrewing' pots each containing a" charge of i particulate; beveragev ingredient; a source vof h'otwater`- under "pressure for brewing fresh beverage; tankmeans for receiving brewed beverage from said brewing means; a ree" y:f'el'ectrical power; waste receivinglmeans' ifrirec vingiwaste leakage and drippage from the various y`elernentsfo'fthe system; switchmeans responsive to thieguantityof wastein said receiving means for 'interrupting' a connection .with lsid power source; coinactuated, electrically erateddispensing means for serving froni'lsaid tankrneans apireeterrnined quantity of beverage on each ac uati'onfand including a circuit having said waste `responsiv` A' switchmeans therein; means for providing a pressur t klifqtiid ow connection between one of said p`ots""`a nd aid s'ureedo'fhot water; and electrically"operatedbeve 'gei'bl'r'ewing control means; includ'ing an eleet'rica'l icircult haviiigl'said( waste responsive switch means ih'ereinloperableias tar'fuhction of the quanmy 'or'beverage'ifi-"saldantemeans te initiate and terminate acw' of hotwater from said sourcethrough saidY 'connection means and into'oriebf said= pots to prepare fresh beverage, saidrnen ncludingmeansfor selecting successiveonesof' 'saidbrewi'ngiptsion each brewing operationA 17. A' unitary "beverage preparing and coin responsive dispensing" machine'fof the character described, which brews beveragefroiii'aipartieulate beverage ingredient, comprising: beverage: brev'vi'iigmean'sy 'including a vplurality of removable'aiid replaceablelpressure brewing pots eachA containing a" charge" of particulate beverage ingredient; alpbvverf'switch1neans responsiveto the pressiirebr wing'ipot'sremainingfunused for interruptingia'connectibn with said'fsource of power; a source ofl hotwaterundeip y "f'or vbrewing fresh beverage; tank niearisifr reeeiymg brewedV beverage from said `brewingmeans;icinlactiiated;x electrically operated kdis-` pensing means Afor serving fronisaidtank means va predetermined quantity of beve e on each actuation; waste receiviiilginie ns fl'rfreeiing ast'e leakage and drippage frorn'the'vr iis el' sdurceof'hot water; and` for interrupting a connection with said power source; means for providing a pressure-tight liquid llow connection between one of said pots and said source of hot water; and electrically operated beverage brewing control means, including an electrical circuit having said waste and prersure brewing responsive switch means therein, operabie as a function of the quantity of beverage in said tank means to initiate and terminate a ilow of hot water from said source through said connection means and into one of said pots to prepare fresh beverage, said means including means for selecting successive ones of said brewing pots on each brewing operation.

References Cited in the iile of this patent UNITED STATES PATENTS 663,723 Brown et al Dec. l1, 1900 1,329,712 Johnson Feb. 3, 1920 1,335,048 Defendorf Mar. 30, 1920 1,552,947 Petersen Sept. 8, 1925 1,621,620 Bast Mar. 22, 1927 1,662,547 Urtis Mar. 13, 1928 1,665,728 Canright Apr. 10, 1928 1,805,159 Bauer et al. May 12, 1931 1,809,899 I-Ieroy June 16, 1931 14 Brand Sept. 8, Strand et al. Aug. 2, Shroyer Apr. 10, Grilli Sept. 10, McLean July 21, Burgess Mar. 7, Herrera June 18, McCauley et al. Jan. 25, Porteous Mar. 27 Dunnihoo May 13, Lime Dec. 23, Kaminky Nov. 22, Hotvedt Mar. 13, Thompson et al. Oct. 23, Catanzano May 20, Mills Oct. 21, Calabrese July 7, Prendergast Oct. 27, Melikian July 6, Melikian et al. July 6,

FOREIGN PATENTS France Oct. 13, France May 29, 

